adding address to contacts on macOS

Apple itself offers a nice piece of code for adding own addresses to "Contacts"-App. (see documentation for "Contacts" - Listing 1 Creating a contact)

I try to use this code. But when executing this, my app crashes with error on saving the data. (see image)

My code so far:

import AppKit
import Contacts

class ContactsClass {
	func addToContacts(
		lastName: String,
		firstName: String,
		birthDate: Date?,
		mail: String = "",
		phone1: String = "",
		phone2: String = "",
		mobile: String = "",
		street: String,
		city: String,
		postCode: String
	) {
		// Create a mutable object to add to the contact
		let contact = CNMutableContact()
			
		contact.givenName = firstName
		contact.familyName = lastName
		
		if mail != "" {
			let homeEmail = CNLabeledValue(label: CNLabelHome, value: mail as NSString)
			contact.emailAddresses = [homeEmail]
		}
		
		contact.phoneNumbers = []
		if phone1 != "" {
			contact.phoneNumbers.append(CNLabeledValue(label: CNLabelPhoneNumberMain, value: CNPhoneNumber(stringValue: phone1)))
		}
		if phone2 != "" {
			contact.phoneNumbers.append(CNLabeledValue(label: CNLabelPhoneNumberMain, value: CNPhoneNumber(stringValue: phone2)))
		}
		if mobile != "" {
			contact.phoneNumbers.append(CNLabeledValue(label: CNLabelPhoneNumberMobile, value: CNPhoneNumber(stringValue: mobile)))
		}
		
		let homeAddress = CNMutablePostalAddress()
		homeAddress.street = street
		homeAddress.city = city
		homeAddress.postalCode = postCode
		contact.postalAddresses = [CNLabeledValue(label: CNLabelHome, value: homeAddress)]
		
		
		if birthDate != nil {
			let calendar = Calendar.current
			let dateComponents = calendar.dateComponents([.year,.month,.day], from: birthDate!)
			
			var birthday = DateComponents()
			birthday.day = dateComponents.day
			birthday.month = dateComponents.month
			birthday.year = dateComponents.year  // (Optional) Omit the year value for a yearless birthday
			contact.birthday = birthday
		}
		// Save the newly created contact
		let store = CNContactStore()
		let saveRequest = CNSaveRequest()
		saveRequest.add(contact, toContainerWithIdentifier: nil)
		do {
			try store.execute(saveRequest)  // <<-- Error appears here!!
		} catch {
			print("Saving contact failed, error: \(error)")
			// Handle the error
		}
	}
}

Console errors are:

2022-10-28 06:26:03.473439+0200 justCare[11808:992463] [api] Attempt to write notes by a pre-Fall-2022 app
2022-10-28 06:26:03.499714+0200 justCare[11808:992463] [plugin] CDX_AB_GetGroupCollectionPath: nil group
2022-10-28 06:26:03.499770+0200 justCare[11808:992463] [plugin] CDX_AB_GetGroupCollectionPath: nil group
2022-10-28 06:26:03.500823+0200 justCare[11808:992463] [ABCDContact] An ABCDRecord is being saved without having a container assignment. Assigning the contact to <CNCDContainer 0x600001f9bba0 ab>. Please remember to assign contacts to containers to avoid recurring container lookup and contact re-validation costs.

Access to Contatcs is granted. Sandboxing is properly set for Contacts. So why this error now?

Environment:

• macOS Ventura
• XCODE 14.0.1